1045043220400 has 60 divisors (see below), whose sum is σ = 2511661712112. Its totient is φ = 417859889920.

The previous prime is 1045043220367. The next prime is 1045043220427. The reversal of 1045043220400 is 40223405401.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 574662 + ... + 1555738.

Almost surely, 2^{1045043220400} is an apocalyptic number.

1045043220400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1045043220400 is an abundant number, since it is smaller than the sum of its proper divisors (1466618491712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1045043220400 is a wasteful number, since it uses less digits than its factorization.

1045043220400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983758 (or 983747 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 1045043220400 its reverse (40223405401), we get a palindrome (1085266625801).

The spelling of 1045043220400 in words is "one trillion, forty-five billion, forty-three million, two hundred twenty thousand, four hundred".